* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html,body {
    width: 100%;
    height: 100%;
}

 .nav {
    width: 100%;
    height: 50px;
    background-color: rgba(0, 0, 0, 0.441);
    color: white;
    display: flex;
    align-items: center;
}